| Runner | Event | Time | Distance | Position | Date |
|---|---|---|---|---|---|
| The Grizzly | 04:07:05 | 20.0miles | 1135 (76 MV55) | 13-03-2005 | |
| Barbara Reading | Oakley 20 | 04:09:19 | 20.0miles | (3 FV70) | 24-03-2024 |
| Mike Reading | The Grizzly | 04:12:10 | 20.0miles | 1185 (26 MV60) | 13-03-2005 |
| Norman King | Oakley 20 | 04:14:01 | 20.0miles | 784 (MV50) | 05-04-2009 |
| Ann Ellmers | Bedford 20m | 04:16:10 | 20.0miles | (FV50) PB | 08-09-2024 |
| Xiomara Herrera-Knight | Nene Valley Trail Run 20Mile 2025 | 04:21:54 | 20.0miles | 33 (6 F) | 14-06-2025 |
| Norman King | Dunstable Downs 20 | 04:25:24 | 20.0miles | 93 (0) | 16-09-2007 |
| Ann Ellmers | Bedford 20 | 04:29:00 | 20.0miles | (FV50) | 05-09-2021 |
| Ruth Chamberlain | dunstable downs 20 | 04:29:26 | 20.0miles | (FV35) | 12-09-2010 |
| Elizabeth Hiner | dunstable downs 20 | 04:29:58 | 20.0miles | (FV35) | 12-09-2010 |
| The Grizzly | 04:30:28 | 20.0miles | 1358 (50 F) | 13-03-2005 | |
| The Grizzly | 04:30:28 | 20.0miles | 1359 (53 FV35) | 13-03-2005 | |
| Helen Liddle | The Grizzly | 04:30:28 | 20.0miles | 1360 (54 FV35) | 13-03-2005 |
| STEPHEN FERGUSON | Bedford Autodrome 20 | 04:31:06 | 20.0miles | 163 (8 MV45) | 31-03-2019 |
| Katy Davies | The Grizzly 20 miles | 04:38:21 | 20.0miles | 697 PB (24 FV40) | 17-03-2024 |
| Chris Dowsett | The Grizzly | 04:52:24 | 20.0miles | () PB | 05-03-2023 |
| Norman King | Meon Valley Plod | 04:53:55 | 20.0miles | 354 (MV50) | 01-03-2009 |
| Norman King | Dunstable Downs 20m | 04:56:01 | 20.0miles | 116 (12 MV50) | 28-09-2008 |
| Elizabeth Hiner | The Grizzly | 05:16:33 | 20.0miles | (F) | 10-03-2013 |
| Annabel Thompson | The Grizzly | 05:16:55 | 20.0miles | 1340 (FV40) | 10-03-2013 |
| Sam Windebank | The Grizzly | 05:16:55 | 20.0miles | 1343 (FV40) | 10-03-2013 |
| Karen Roper | The Grizzly | 05:16:55 | 20.0miles | 1342 (FV35) | 10-03-2013 |
| Ruth Chamberlain | The Grizzly | 05:16:55 | 20.0miles | 1341 (FV35) | 10-03-2013 |
| Rebecca Mutlow | The Grizzly 20 miles | 05:33:25 | 20.0miles | 1099 PB (60 FV40) | 17-03-2024 |
| Anthony Nethercott | Man v Horse | 03:37:53 | 20.5miles | 207 (29 MV50) | 11-06-2022 |